Diagnostic x-ray imaging system

Details Diagnostic x-ray imaging system Diagnostic x-ray imaging system

1977-06-20

1979-01-16

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

250394, G01T 100

Patent

active

041350910

ABSTRACT:
A radiation imaging system employs a superheated, superconducting colloid detector subjected to an external magnetic field so that the colloid grains are maintained in a metastable superconducting state in the absence of radiation. Intersecting sets of select wires are imbedded in the detector that divide the detector into volumetric resolution elements. Grains in each resolution element that absorb photons emanating from an object "flip" to the normal conducting state. By applying coincident currents to the select wires defining each element, a local magnetic field is produced that opposes the external field so that all the "flipped" grains are reset to the superconducting state. This produces a flux change proportional to the number of photons incident on that element which is sensed and used to develop an x-ray image of the object.

REFERENCES:
patent: 4037102 (1977-07-01), Hoyle et al.

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